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#Pixel 3 grid autosport wallpapers how to#

This RGB Explorer page which shows how any color can be made by combining red, green, and blue light. The best way to see how RGB works is to just play with. In RGB, every color is defined as a particular combination of pure red, green, and blue light.

#Pixel 3 grid autosport wallpapers how to#

How to represent the color of a pixel? The red/green/blue (RGB) scheme is one popular way of representing a color in the computer. Other dimensions are brightness and saturation (pastel) The Newton prism shows the "hue" dimension

Aside: technically color is a 3-dimensional space, not getting into details.

Note: mixing lights works differently from mixing paints.

There are other schemes, but RGB is very common.

Make any color by combining red/green/blue lights.

Coming out of the prism we have a continuous range of pure colors, and a few are picked out by name: red, orange, yellow, green, blue, indigo, violet (ROY G BIV). White sunlight is coming in from the left into the glass triangular prism which splits up the light. Here is a picture of the experiment on my floor. Sir Isaac Newton did the famous prism experiment in 1665, showing that white light is made up of a spectrum pure colored light.

Like running the experiment backwards to make white.

Red, orange, yellow, green, blue, indigo, violet (ROY G BIV).

White light - broken up into pure colors, continuous.

x=0, y=1 neighbor below the origin - (0, 1).

x=1, y=0 neighbor to the right of origin - (1, 0).

x=0, y=0 "origin" upper left corner - aka (0, 0).

You just need to appreciate that there is this x/y coordinate system, so that every pixel in an image has some x/y coordinate that identifies its location within the image grid. We will not work with individual x/y coordinates too much.

Zooming in on the upper left flower, we can see that it is actually made of many square "pixels", each showing one color. Typical digital image = 5-20 megapixels.How many pixels in an image 800 pixel wide, 600 pixels high?.Perceive the whole scene, not tiny pixels.Here is a digital image of some yellow flowers: What looks like a whole image to us, in the computer is a structure made of many little numbers. Here we will look behind the curtain, seeing how images are put together. You see images on computers all the time. Aside: more compelling internet use: text or images?.Behind the scenes: lots of little numbers.(Hat tip to Mark Guzdial and Barbara Ericson for promoting the media computation idea of using images, sounds etc. In this section we'll look at how digital images work.